The objectives, test configurations, and instrumentation implementation of the HARD PAN I test series are presented in three voluumes. Volume I describes the high-explosive test events (5 major and 13 calibration events) performed to obtain experimental measurements of the shock environment in the vicinity of a test structure in a layered geology due to a simulated near-surface neclear detonation. The test geology was clay over interbedded limestone and shale. Structure medium interaction (SMI) data obtained in the test series is to be used in development of prediction codes for use in analyses relating to facility design, modification, and hardness validation and/or assessment. Beam-loaded explosive simulation technique (BLEST), a new technique for high-explosive simulation of nuclear detonation effects, is described. The first use of BLEST was in the HARD PAN I series where it augmented the more precise HEST USED TO PROVIDE DIRECT AIRBLAST LOADING, AND INCREASED TOTAL SIMULATION TIMES AT ACCEPTABLE ADDITIONAL COST. Volume I also includes specific operational plans (safety, communications, security) and data analysis requirements. Volume II (Appendix P) describes the instrumentation systems used to obtain motion, stress, and strain data from free-field and structure locations in the first three major events and the calibration events. Measurements lists are included. Volume III (Appendix P, Continued) describes the instrumenting of the final two major events and lists all measurements.